name: Release Issues
on:
  pull_request_target:
    types:
      - opened
      - reopened
      - synchronize
      - ready_for_review
      - closed
    branches:
      - master

permissions:
  issues: write
  pull-requests: write

concurrency:
  group: release-issues-${{ github.event.pull_request.number }}

jobs:
  release-issues:
    if: github.repository_owner == 'GameServerManagers' && startsWith(github.event.pull_request.head.ref, 'release/') && github.event.pull_request.head.repo.full_name == github.repository
    runs-on: ubuntu-latest
    steps:
      - name: List fixed issues in the release PR and close them on merge
        uses: actions/github-script@v9
        with:
          script: |
            const { owner, repo } = context.repo;
            const pr = context.payload.pull_request;
            const fixedLabel = 'status: fixed in develop';
            const start = '<!-- release-issues:start -->';
            const end = '<!-- release-issues:end -->';

            const labelled = (await github.paginate(github.rest.issues.listForRepo, { owner, repo, state: 'all', labels: fixedLabel, per_page: 100 }))
              .filter((issue) => !issue.pull_request)
              .sort((a, b) => a.number - b.number);

            if (context.payload.action === 'closed') {
              if (!pr.merged) {
                return;
              }
              const version = pr.head.ref.replace(/^release\//, '');
              for (const issue of labelled) {
                if (issue.state === 'open') {
                  await github.rest.issues.createComment({ owner, repo, issue_number: issue.number, body: `Released in ${version} (#${pr.number}).` });
                  await github.rest.issues.update({ owner, repo, issue_number: issue.number, state: 'closed', state_reason: 'completed' });
                  core.info(`Closed #${issue.number}.`);
                }
                await github.rest.issues.removeLabel({ owner, repo, issue_number: issue.number, name: fixedLabel }).catch(() => {});
              }
              return;
            }

            const open = labelled.filter((issue) => issue.state === 'open');
            const lines = open.length > 0 ? open.map((issue) => `Fixes #${issue.number}`) : [`No open issues are labelled "${fixedLabel}".`];
            const block = [start, '## Issues fixed in this release', '', ...lines, end].join('\n');

            const current = pr.body || '';
            const pattern = new RegExp(`${start}[\\s\\S]*?${end}`);
            const updated = pattern.test(current) ? current.replace(pattern, block) : `${current.trim() ? `${current.trimEnd()}\n\n` : ''}${block}\n`;
            if (updated !== current) {
              await github.rest.pulls.update({ owner, repo, pull_number: pr.number, body: updated });
              core.info(`Listed ${open.length} issue(s) in #${pr.number}.`);
            }